Comment puis-je résoudre le Android Firebase d'erreur “Défaut FirebaseApp n'est pas initialisé dans ce processus”?

Je suis en utilisant FirebaseAuth pour l'enregistrement de l'utilisateur avec l'email et le mot de passe, et j'ai déjà ajouté le plugin et dépendances dans mon projet.

MainActivity.java

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
EditText ed_email, ed_pass;
Button but_login;
ProgressDialog progressDialog;
FirebaseAuth firebaseAuth;
Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context=getApplicationContext();
FirebaseApp.initializeApp(context);
firebaseAuth=FirebaseAuth.getInstance();
ed_email= (EditText) findViewById(R.id.ed_email);
ed_pass= (EditText) findViewById(R.id.ed_pass);
but_login= (Button) findViewById(R.id.but_login);
but_login.setOnClickListener(this);
progressDialog=new ProgressDialog(this);
}
public void registerUser(){
String email=ed_email.getText().toString().trim();
String pass=ed_pass.getText().toString().trim();
if(TextUtils.isEmpty(email)){
Toast.makeText(getApplicationContext(),"Invalid Input",Toast.LENGTH_SHORT).show();
return;
}
if(TextUtils.isEmpty(pass)){
Toast.makeText(getApplicationContext(),"Invalid Input",Toast.LENGTH_SHORT).show();
return;
}
progressDialog.setMessage("You are registering...");
progressDialog.show();
firebaseAuth.createUserWithEmailAndPassword(email,pass).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
Toast.makeText(getApplicationContext(), "Success", Toast.LENGTH_SHORT).show();
progressDialog.hide();
} else {
Toast.makeText(getApplicationContext(), "Sorry...!!!", Toast.LENGTH_SHORT).show();
progressDialog.hide();
}
}
});
}
@Override
public void onClick(View v) {
registerUser();
}

}

logcat -

com.skapsdevelopment.firebase E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.skapsdevelopment.firebase, PID: 31993
Theme: themes:{default=overlay:com.resurrectionremix.pitchblack, iconPack:com.baranovgroup.nstyle, fontPkg:com.resurrectionremix.pitchblack, com.android.systemui=overlay:com.resurrectionremix.pitchblack, com.android.systemui.navbar=overlay:com.resurrectionremix.pitchblack}
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.skapsdevelopment.firebase/com.skapsdevelopment.firebase.MainActivity}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.skapsdevelopment.firebase. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2450)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5461)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.skapsdevelopment.firebase. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(Unknown Source)
at com.google.firebase.auth.FirebaseAuth.getInstance(Unknown Source)
at com.skapsdevelopment.firebase.MainActivity.onCreate(MainActivity.java:35)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5461)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Mon Application n'est pas en commençant et en affichant le message d'erreur suivant:

java.lang.IllegalStateException: Default FirebaseApp is not initialized in this 
process com.skapsdevelopment.firebase. 
Make sure to call FirebaseApp.initializeApp(Context) first.

Pourquoi l'application ne démarre pas correctement?

OriginalL'auteur Subham Kaps | 2016-10-20